Permit Requirements by State
Legal-without-permit limits, escort thresholds, height pole rules, daylight-only windows, and holiday restrictions for all 50 states + DC. Each state cites the underlying admin code.
Browse all states →Bridge Formula B Calculator
Interactive calculator for the FHWA Federal Bridge Formula. Enter axle count and outermost-axle distance; get max allowable gross weight on that group of axles.
Use the calculator →Pilot Car Certification Reciprocity
The 15+ states that require pilot car certification, the program names, and the reciprocity matrix showing which states accept which others' certs.
Read the guide →Holiday Movement Restrictions by State
Per-state table of which holidays prohibit oversize movement, plus the standard noon-before to sunrise-after blackout windows and unusual outliers.
Read the guide →Heavy Haul Glossary
60+ heavy-haul terms defined in plain English — RGN, lowboy, jeep, booster, superload, BFG, escort, route survey, and more. Useful onboarding tool for new dispatchers.
Read the glossary →Route Survey Guide
When state DOT permits require a physical route survey, what surveys cover, the 7-step process from desk-survey to permit-office submission, and a printable 30-item checklist.
Read the guide →Superload Classification by State
At what dimensions does a load become a "superload" in each state? Per-state thresholds that trigger engineering review, police escort, and 30–60 day permit lead times.
Read the guide →Why these guides exist
Per-state oversize and overweight rules drift constantly. Escort thresholds get tightened, holiday windows get expanded, admin code sections get renumbered. Dispatchers and pilot car operators end up bookmarking the state DOT permit page for every state they route through.
These guides collect that information in one place, with the underlying admin code citation, and we keep them aligned with the rule library that powers OverSizeTMS. The same data drives the in-product permit workflow, escort rule engine, and route survey module.
If you spot an outdated threshold or rule, email [email protected] and we'll verify and update — usually within 48 hours.